Marine Interpretation Message
Issued by NWS

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000
AGPN40 KWNM 182100
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
200 PM PDT FRI APR 18 2014

.FORECAST DISCUSSION: MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT
.WEATHER FOR THE NORTH PACIFIC N OF 30N AND E OF 150W.

PER THE 18Z OPC SFC ANALYSIS A HIGH PRES RIDGE WAS OVER MOST OF
THE PZ5/PZ6 WATERS...W/A 1013 MB LOW OVER THE NE SRN CA WATERS.

12Z GUIDANCE WAS IN AGREEMENT THROUGH TUE SO FAVORED 12Z
GFS THROUGH THEN...W/A BLEND OF THE 12Z GFS/ECMWF TUE NIGHT AND
WED. NOT MANY SIGNIFICANT CHANGES TO BE MADE TO THE ONGOING
FORECAST. STRONG LOW PRES/COLD FRONT APPROACH THE WATERS W/GALES
DEVELOPING TONIGHT OVER PARTS OF THE PZ5 WATERS. WINDS EASE SAT AS
A HIGH PRES RIDGE DEVELOPS OVERHEAD...THEN ANOTHER COLD FRONT
MOVES THROUGH SUN INTO MON. ON TUE WEAK LOW SLIDES SE ACROSS THE
PZ5 WATERS FOLLOWED BY A COLD FRONT SLIDING THROUGH THE WATERS
WED. A HIGH PRES RIDGE REMAINS THE DOMINATE FEATURE OVER THE SRN
HALF OF THE PZ6 WATERS...THOUGH A LOW PRES TROUGH DEVELOPS ALONG
THE SRN CA COAST SUN THEN WEAKENS MON. ANOTHER DEVELOPS LATE TUE
INTO WED RESULTING IN INCREASED WINDS...MAINLY OVER THE SRN CA
WATERS. 12Z GFS/CMC HINTS AT POSSIBILITY OF GALES LATE TUE INTO
WED IN THE NE SRN CA WATERS W/THE 12Z ECMWF HAVING A BRIEF PERIOD
OF 30 KT WINDS. HOWEVER GIVEN THIS IS DAY 5 WILL NOT ADD IN ANY
MENTION OF GALES FOR NOW AND AWAIT FURTHER MODEL RUNS TO SEE IF
THIS TREND HOLDS.

.SEAS...FAVORED 12Z NWW3 OVER MUCH OF THE PERIOD W/A BLEND OF THE
12Z ECMWF WAVE MODEL ON DAY 5.


.EXTRATROPICAL STORM SURGE GUIDANCE...


.WARNINGS...PRELIMINARY. ANY CHANGES WILL BE COORDINATED THROUGH
AWIPS 12 PLANET CHAT OR BY TELEPHONE:

.PZ5 WASHINGTON/OREGON WATERS...
.PZZ800...INNER WATERS FROM CAPE FLATTERY TO CAPE SHOALWATER...
     GALE TONIGHT.
.PZZ900...OUTER WATERS FROM CAPE FLATTERY TO CAPE SHOALWATER...
     GALE TODAY INTO TONIGHT.
.PZZ905...OUTER WATERS FROM CAPE SHOALWATER TO CAPE LOOKOUT...
     GALE TONIGHT.

.PZ6 CALIFORNIA WATERS...
     NONE.

$$

.FORECASTER HOLLEY. OCEAN PREDICTION CENTER.


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